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778990 Aldrich

Sulfuric acid, fuming

reagent grade, 65.5-68.0% free SO3 basis (with NaOH)

Synonym: Oleum

  • CAS Number 8014-95-7

  • Linear Formula H2SO4 · (SO3)x

  • Molecular Weight 98.08

  •  Beilstein Registry Number 2037554

  •  MDL number MFCD00137792

  •  PubChem Substance ID 329768006

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Properties

Related Categories Acids, Acids & Bases, Chemical Synthesis, Inorganic Acids, Synthetic Reagents More...
grade   reagent grade
vapor density   3 (vs air)
vapor pressure   2 mmHg ( 25 °C)
InChI Key   HIFJUMGIHIZEPX-UHFFFAOYSA-N
assay   65.5-68.0% free SO3 basis (with NaOH)
density   1.925 g/mL at 25 °C(lit.)

Description

Caution

may contain particle

General description

Fuming sulfuric acid is an inorganic acid, produced by the addition of sulfur trioxide to concentrated sulfuric acid. It is commonly used for sulfonation reactions.1 Surface functionalization of poly (propylene) (PP) films using fuming sulfuric acid has been analyzed using X-ray photoelectron spectroscopy (XPS), attenuated total reflectance (ATR) infrared spectroscopy, and chemical modification. It is reported to assist the bromination of methylpyridines in the pyridine nucleus. Fuming sulfuric acid oxidizes fullerene C60 to form fullerene polymers.

Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
Precautionary statements 
Supplemental Hazard Statements 
Reacts violently with water.
RIDADR 
UN1831- class 8 - PG 1- Sulfuric acid, fuming with 30 percent or more free sulfur trioxide
WGK Germany 
1
RTECS 
WS5605000

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Peer-Reviewed Papers
15

References

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